/*

 * jQuery selectbox plugin

 *

 * Copyright (c) 2007 Sadri Sahraoui (brainfault.com)

 * Licensed under the GPL license and MIT:

 *   http://www.opensource.org/licenses/GPL-license.php
 *   http://www.opensource.org/licenses/mit-license.php

 *

 * The code is inspired from Autocomplete plugin (http://www.dyve.net/jquery/?autocomplete)

 *

 * Revision: $jId$j

 * Version: 0.5
 * 
 * Changelog :
 *  Version 0.5 
 *  - separate css style for current selected element and hover element which solve the highlight issue 
 *  Version 0.4
 *  - Fix width when the select is in a hidden div   @Pawel Maziarz
 *  - Add a unique id for generated li to avoid conflict with other selects and empty values @Pawel Maziarz

 */

jQuery.fn.extend({

	selectbox: function(options) {

		return this.each(function() {

			new jQuery.SelectBox(this, options);

		});

	}

});



/* pawel maziarz: work around for ie logging */

if (!window.console) {

	var console = {

		log: function(msg) { 

	 }

	}

}

/* */


jQuery.SelectBox = function (selectobj, options) {



    var opt = options || {};

    opt.inputClass = opt.inputClass || "selectbox";

    opt.containerClass = opt.containerClass || "selectbox-wrapper";

    opt.hoverClass = opt.hoverClass || "current";
    opt.currentClass = opt.selectedClass || "selected"

    opt.debug = opt.debug || false;



    var elm_id = selectobj.id;

    var active = -1;

    var inFocus = false;

    var hasfocus = 0;

    //jquery object for select element

    var $jselect = $j(selectobj);

    // jquery container object

    var $jcontainer = setupContainer(opt);

    //jquery input object 

    var $jinput = setupInput(opt);

    // hide select and append newly created elements

    $jselect.hide().before($jinput).before($jcontainer);




    init();



    $jinput

	.click(function () {

	    if (!inFocus) {

	        $jcontainer.toggle();

	    }

	})

	.focus(function () {

	    if ($jcontainer.not(':visible')) {

	        inFocus = true;

	        $jcontainer.show();

	    }

	})

	.keydown(function (event) {

	    switch (event.keyCode) {

	        case 38: // up

	            event.preventDefault();

	            moveSelect(-1);

	            break;

	        case 40: // down

	            event.preventDefault();

	            moveSelect(1);

	            break;

	        //case 9:  // tab  

	        case 13: // return

	            event.preventDefault(); // seems not working in mac !
	            $j('li.' + opt.hoverClass).trigger('click');

	            break;
	        case 27: //escape
	            hideMe();
	            break;

	    }

	})

	.blur(function () {

	    if ($jcontainer.is(':visible') && hasfocus > 0) {

	        if (opt.debug) console.log('container visible and has focus')

	    } else {

	        hideMe();

	    }

	});





    function hideMe() {

        hasfocus = 0;

        $jcontainer.hide();

    }



    function init() {

        $jcontainer.append(getSelectOptions($jinput.attr('id'))).hide();
        var width = $jinput.css('width');

        $jcontainer.width(width);

    }



    function setupContainer(options) {

        var container = document.createElement("div");

        $jcontainer = $j(container);

        $jcontainer.attr('id', elm_id + '_container');

        $jcontainer.addClass(options.containerClass);



        return $jcontainer;

    }



    function setupInput(options) {

        var input = document.createElement("input");

        var $jinput = $j(input);

        $jinput.attr("id", elm_id + "_input");

        $jinput.attr("type", "text");

        $jinput.addClass(options.inputClass);

        $jinput.attr("autocomplete", "off");

        $jinput.attr("readonly", "readonly");

        $jinput.attr("tabIndex", $jselect.attr("tabindex")); // "I" capital is important for ie



        return $jinput;

    }



    function moveSelect(step) {

        var lis = $j("li", $jcontainer);

        if (!lis) return;



        active += step;



        if (active < 0) {

            active = 0;

        } else if (active >= lis.size()) {

            active = lis.size() - 1;

        }



        lis.removeClass(opt.hoverClass);



        $j(lis[active]).addClass(opt.hoverClass);

    }



    function setCurrent() {


        var li = $j("li." + opt.currentClass, $jcontainer).get(0);

        var ar = ('' + li.id).split('_');

        var el = ar[ar.length - 1];

        $jselect.val(el);

        $jinput.val($j(li).html());
        $jselect.click();

        return true;

    }



    // select value

    function getCurrentSelected() {

        return $jselect.val();

    }



    // input value

    function getCurrentValue() {

        return $jinput.val();

    }



    function getSelectOptions(parentid) {

        var select_options = new Array();

        var ul = document.createElement('ul');

        $jselect.children('option').each(function () {

            var li = document.createElement('li');
            li.setAttribute('id', parentid + '_' + $j(this).val());

            li.innerHTML = $j(this).html();

            if ($j(this).is(':selected')) {

                $jinput.val($j(this).html());

                $j(li).addClass(opt.currentClass);

            }

            ul.appendChild(li);

            $j(li)

			.mouseover(function (event) {

			    hasfocus = 1;

			    if (opt.debug) console.log('over on : ' + this.id);

			    jQuery(event.target, $jcontainer).addClass(opt.hoverClass);

			})

			.mouseout(function (event) {

			    hasfocus = -1;

			    if (opt.debug) console.log('out on : ' + this.id);

			    jQuery(event.target, $jcontainer).removeClass(opt.hoverClass);

			})

			.click(function (event) {
			    var fl = $j('li.' + opt.hoverClass, $jcontainer).get(0);

			    if (opt.debug) console.log('click on :' + this.id);
			    $j('li.' + opt.currentClass).removeClass(opt.currentClass);

			    $j(this).addClass(opt.currentClass);

			    setCurrent();

			    hideMe();

			});

        });

        return ul;

    }



};